To efficiently collect sperms by enabling to moderately compress a penis by directly applying finger pressure to a tubular body, which can not be done by an instrument comprising a tubular body for collecting sperms provided with a shell (case) around it.

The efficient sperm collecting instrument includes the tubular body which is formed of a soft and elastic material and a case which covers the surroundings of it. The case has openings in several places in the direction of its length. A pressing tool which is provided with a flange part laid over the edge of the opening from the inside is arranged in each of the openings and is arranged so that finger pressure may be applied to the tubular body and it may return to its original position by an elastic force of the tubular body. Each of the pressing tool is provided with a position adjusting means in the direction of the tubular body. Rings for applying tension in the direction of compression of the tubular body are further arranged around the tubular body or the pressing tools.